U.S. safety regulators have upgraded their probe into Tesla TSLA.O vehicles over power steering loss to an engineering analysis – a required step before the agency could demand a potential recall.

The National Highway Traffic Safety Administration (NHTSA) on Friday said the investigation covers about 334,000 Model 3 and Model Y vehicles from the 2023 model year.

The agency’s upgraded probe follows a December Reuters investigation that found tens of thousan

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